'use strict';

function get_letter_interval_2(number_a, number_b) {
  //在这里写入代码
  let arr=[];
  if(number_a<number_b)
  {
    for(let i=number_a;i<=number_b;i++)
    {
      if(i<=26)
      {
        arr.push(String.fromCharCode(i+96));
      }
      else
      {
        if(i%26===0)
        {
          arr.push(String.fromCharCode((i/26)-1+96)+String.fromCharCode(26+96));
        }
        else
        {
          arr.push(String.fromCharCode(parseInt(i/26)+96)+String.fromCharCode((i%26)+96));
        }
      }
    }
  }
  else if(number_a>number_b)
  {
    for(let i=number_a;i>=number_b;i--)
    {
      if(i<=26)
      {
        arr.push(String.fromCharCode(i+96));
      }
      else
      {
        if(i%26===0)
        {
          arr.push(String.fromCharCode((i/26)-1+96)+String.fromCharCode(26+96));
        }
        else
        {
          arr.push(String.fromCharCode(parseInt(i/26)+96)+String.fromCharCode((i%26)+96));
        }
      }
    }



  }
  else
  {
  
    arr.push(String.fromCharCode(parseInt(number_a/26)+96)+String.fromCharCode((number_a%26)+96));
  }
return arr;
  
  
 

}

module.exports = get_letter_interval_2;

